| 摘要 |
PURPOSE:To make easy to know which route of a program is tested or not yet tested, by analyzing the alternation career of instruction code of all the branch instructions on the program after the execution of program. CONSTITUTION:The operation code Bi of branch instruction is converted into Bix in advance and program is executed. The instruction having the Bix instruction code, changes the instruction code Bix to Biz on the memory when it is branched in addition to the branch instruction of the instruction code Bi, and changes to Biy when not branched. Next, when this branch instruction is executed, in case of the instruction code Biy, the instruction code on the memory is changed to the instruction code Bi of original branch instruction, with being branched in case of the instruction code Biy and without being branched in case of Biz. Further, in case of the instruction code Bi, the same operation as normal branch instruction Bi is made. Thus, after program is run, by retrieving the instruction code of the branch instruction in the program, which direction of the branch is scanned at least once is known relating to each branch instruction. |
